The interfering ions could affect the extraction recovery of
Ag(I) by interaction with MBI or Ag(I) ions. Thus, the influence of
different cations and anions on the preconcentration and
determination of 50 ng mL1 Ag(I) by the proposed method
was studied. The tolerance limit was defined as the maximum
concentration of foreign ion causing an error of less than 5%
in the determination of Ag(I). The results given in Table 1
indicate that the proposed method is more selective to Ag(I)
than a large number of cations and anions under optimum
conditions.